As far as i know all the contracts get the same payout per MH

1 MH Scrypt (Lifetime contract)

27.09.2014      BTC      0.00038361
26.09.2014      BTC      0.00040342
25.09.2014      BTC      0.00044169
24.09.2014      BTC      0.00044423
23.09.2014      BTC      0.00039934
22.09.2014      BTC      0.00041299